System calls in Unix

[jml06]

Hello one and all,

I need to implement a system calls using C++ in Unix, I really hope someone outhere can help me....

The task is to implement the following system call:
-create a file
-open file
-close
-write
-read
-and exit

my first problem is I don't have Unix, so how do I do to implement the system with my current windows, without installing Unix..

I'm a beginner...

any help are appreciated...thanks

jml

[Banfa]

You should be able to write a program that does that in a portable way. That is write it on Windows so that the code will easily recompile on UNIX.

Write a console program with a main entry point

Use only standard C functions (or C++ classes)

For file IO I suggest the functions

fopen
fread
fwrite
fputs
fprintf
fclose

I suggest you look these up.

[jml06]

Thanks for your suggestion....

But I not very simillar with the codes...

I will look these up....

but how about if I use fstream....can it run on Unix....
example: ifstream infile;
string filename="abc.txt";
infile.open(filename.c_str(),ios::in);


and what is the different for using C in windows and unix?....